binder: 10638:10653 transaction failed 29189/-3, size 0-0 line 3128
binder: undelivered TRANSACTION_ERROR: 29189
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x387e/0x4b50 kernel/locking/lockdep.c:3092
Read of size 8 at addr ffff8801c4954338 by task syz-executor5/10649

CPU: 1 PID: 10649 Comm: syz-executor5 Not tainted 4.4.113-g202e079 #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 cc4bbda5ca557ea6 ffff8801c4aaf630 ffffffff81d0278d
 ffffea0007125500 ffff8801c4954338 0000000000000000 ffff8801c4954338
 0000000000000000 ffff8801c4aaf668 ffffffff814fd053 ffff8801c4954338
Call Trace:
 [<ffffffff81d0278d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0278d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff814fd053>] print_address_description+0x73/0x260 mm/kasan/report.c:252
 [<ffffffff814fd565>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff814fd565>] kasan_report+0x285/0x370 mm/kasan/report.c:408
 [<ffffffff814fd6c4>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff81239c3e>] __lock_acquire+0x387e/0x4b50 kernel/locking/lockdep.c:3092
 [<ffffffff8123c77e>] lock_acquire+0x15e/0x460 kernel/locking/lockdep.c:3592
 [<ffffffff8377172e>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:112 [inline]
 [<ffffffff8377172e>] _raw_spin_lock_irqsave+0x4e/0x70 kernel/locking/spinlock.c:159
 [<ffffffff8121f0a4>] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49
 [<ffffffff815f57d8>] ep_remove_wait_queue fs/eventpoll.c:530 [inline]
 [<ffffffff815f57d8>] ep_unregister_pollwait.isra.6+0xa8/0x220 fs/eventpoll.c:548
 [<ffffffff815f6221>] ep_remove+0x41/0x290 fs/eventpoll.c:711
 [<ffffffff815f8205>] eventpoll_release_file+0xc5/0x140 fs/eventpoll.c:935
 [<ffffffff81522651>] eventpoll_release include/linux/eventpoll.h:61 [inline]
 [<ffffffff81522651>] __fput+0x521/0x6d0 fs/file_table.c:199
 [<ffffffff81522885>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff8118b9d4>] task_work_run+0x104/0x180 kernel/task_work.c:115
 [<ffffffff81132f7a>] exit_task_work include/linux/task_work.h:21 [inline]
 [<ffffffff81132f7a>] do_exit+0x82a/0x2a10 kernel/exit.c:755
 [<ffffffff81139418>] do_group_exit+0x108/0x320 kernel/exit.c:885
 [<ffffffff8115c872>] get_signal+0x4f2/0x1550 kernel/signal.c:2317
 [<ffffffff8100e7fb>] do_signal+0x8b/0x1d40 arch/x86/kernel/signal.c:712
 [<ffffffff810035fa>] exit_to_usermode_loop+0x11a/0x160 arch/x86/entry/common.c:247
 [<ffffffff81006535>] prepare_exit_to_usermode arch/x86/entry/common.c:282 [inline]
 [<ffffffff81006535>] syscall_return_slowpath+0x1b5/0x1f0 arch/x86/entry/common.c:347
 [<ffffffff83771ce9>] int_ret_from_sys_call+0x25/0xa3

Allocated by task 10649:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc0c3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fc38d>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fc38d>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814f8310>] kmem_cache_alloc_trace+0x100/0x2b0 mm/slub.c:2642
 [<ffffffff82c7b46d>] kmalloc include/linux/slab.h:476 [inline]
 [<ffffffff82c7b46d>] kzalloc include/linux/slab.h:620 [inline]
 [<ffffffff82c7b46d>] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4452
 [<ffffffff82c7baaa>] binder_poll+0x4a/0x210 drivers/android/binder.c:4555
 [<ffffffff815f9651>] ep_item_poll fs/eventpoll.c:806 [inline]
 [<ffffffff815f9651>] ep_insert fs/eventpoll.c:1319 [inline]
 [<ffffffff815f9651>] SYSC_epoll_ctl fs/eventpoll.c:1934 [inline]
 [<ffffffff815f9651>] SyS_epoll_ctl+0x10b1/0x2040 fs/eventpoll.c:1833
 [<ffffffff83771b5f>] entry_SYSCALL_64_fastpath+0x1c/0x98

Freed by task 10649:
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc0c3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fc9e2>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fc9e2>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f947c>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f947c>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f947c>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f947c>] kfree+0xfc/0x300 mm/slub.c:3749
 [<ffffffff82c749d1>] binder_free_thread drivers/android/binder.c:4480 [inline]
 [<ffffffff82c749d1>] binder_thread_dec_tmpref+0x1c1/0x250 drivers/android/binder.c:2036
 [<ffffffff82c7550d>] binder_thread_release+0x27d/0x540 drivers/android/binder.c:4544
 [<ffffffff82c90134>] binder_ioctl+0xb94/0x12e0 drivers/android/binder.c:4760
 [<ffffffff815588ca>] vfs_ioctl fs/ioctl.c:43 [inline]
 [<ffffffff815588ca>] do_vfs_ioctl+0x7aa/0xee0 fs/ioctl.c:607
 [<ffffffff8155908f>] SYSC_ioctl fs/ioctl.c:622 [inline]
 [<ffffffff8155908f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:613
 [<ffffffff83771b5f>] entry_SYSCALL_64_fastpath+0x1c/0x98

The buggy address belongs to the object at ffff8801c4954280
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 184 bytes inside of
 512-byte region [ffff8801c4954280, ffff8801c4954480)
The buggy address belongs to the page:
kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
BUG: unable to handle kernel paging request at ffffea0007125500
IP: [<ffffea0007125500>] 0xffffea0007125500
PGD 21f7fa067 PUD 21f7f9067 PMD 800000021de000e3 
Oops: 0011 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 6 Comm: kworker/u4:0 Not tainted 4.4.113-g202e079 #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: binder binder_deferred_func
task: ffff8801da370000 task.stack: ffff8801da378000
RIP: 0010:[<ffffea0007125500>]  [<ffffea0007125500>] 0xffffea0007125500
RSP: 0018:ffff8801db207d18  EFLAGS: 00010206
RAX: ffffea0007125500 RBX: ffff8801db207d68 RCX: ffffffff8129fd3b
RDX: 0000000000000100 RSI: ffffffff847ebaf8 RDI: 0000000000000000
RBP: ffff8801db207df0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 1ffff1003b640fa9
R13: ffff8801c486fb50 R14: 0000000000000101 R15: ffffffff83844340
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffea0007125500 CR3: 00000001c5100000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff8129fd4b ffffffff8129fc9c 0000000000000000 ffffffff842c3560
 0000000000000000 ffffea0007125500 0000000041b58ab3 ffffffff83faa139
 ffffffff8129fbc0 ffff8801db207db0 ffffffff85701a80 0000000000000000
Call Trace:
 <IRQ> 
 [<ffffffff812a1e04>] __run_timers kernel/time/timer.c:1254 [inline]
 [<ffffffff812a1e04>] run_timer_softirq+0x604/0xbb0 kernel/time/timer.c:1437
 [<ffffffff83775057>] __do_softirq+0x227/0xa38 kernel/softirq.c:273
 [<ffffffff8113daf9>] invoke_softirq kernel/softirq.c:350 [inline]
 [<ffffffff8113daf9>] irq_exit+0x119/0x140 kernel/softirq.c:391
 [<ffffffff837747bb>] exiting_irq arch/x86/include/asm/apic.h:653 [inline]
 [<ffffffff837747bb>] smp_apic_timer_interrupt+0x7b/0xa0 arch/x86/kernel/apic/apic.c:926
 [<ffffffff83773710>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:737
 <EOI> 
 [<ffffffff8126955e>] vprintk_emit+0x55e/0x850 kernel/printk/printk.c:1832
 [<ffffffff81269878>] vprintk+0x28/0x30 kernel/printk/printk.c:1843
 [<ffffffff8126989d>] vprintk_default+0x1d/0x30 kernel/printk/printk.c:1844
 [<ffffffff8141a7bd>] printk+0xb7/0xe2 kernel/printk/printk.c:1922
 [<ffffffff82c75178>] binder_release_work+0x148/0x260 drivers/android/binder.c:4373
 [<ffffffff82c75505>] binder_thread_release+0x275/0x540 drivers/android/binder.c:4543
 [<ffffffff82c7a268>] binder_deferred_release drivers/android/binder.c:5082 [inline]
 [<ffffffff82c7a268>] binder_deferred_func+0x438/0xd10 drivers/android/binder.c:5154
 [<ffffffff8117fd87>] process_one_work+0x7d7/0x16e0 kernel/workqueue.c:2064
 [<ffffffff81180d69>] worker_thread+0xd9/0xfc0 kernel/workqueue.c:2196
 [<ffffffff811907d8>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff83771f85>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:506
Code: 00 00 00 12 00 12 00 01 00 00 00 00 01 00 00 00 00 ad de 00 02 00 00 00 00 ad de 40 46 26 da 01 88 ff ff 00 00 00 00 00 00 00 00 <80> 40 00 00 00 00 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00 
RIP  [<ffffea0007125500>] 0xffffea0007125500
 RSP <ffff8801db207d18>
CR2: ffffea0007125500
---[ end trace 4a917eabd4aa3d8b ]---